speech_sample_16k_mono.pcm

20 seconds of English speech, raw 16-bit little-endian PCM, 16 kHz, mono.
Used by the hardware check (src/hardware_check.rs) to measure how fast Whisper
runs on the user's machine.

Source: chapter 1 of "The English Lakes", a LibriVox recording (archive.org
item englishlakes_2408_librivox), seconds 60-80. LibriVox recordings are in the
public domain (Public Domain Mark 1.0).
